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Solar Rotation and Large-Scale Flows Measured by Time-Distance Helioseismology from Mdi

  • P.M. Giles (a1) and T.L. Duvall (a2)

Abstract

The technique of time-distance helioseismology provides a new tool for examining large-scale flows beneath the sun's surface. We have used this technique to study the meridional flow and have found that the poleward flow observed at the surface appears to persist to a depth of at least 26,000 km. We have also examined the differential rotation in these uppermost layers, and find a slight asymmetry between the northern and southern hemispheres.

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References

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